A P(V)–N Activation Strategy for the Synthesis of Nucleoside Polyphosphates
作者:Qi Sun、Shanshan Gong、Jian Sun、Si Liu、Qiang Xiao、Shouzhi Pu
DOI:10.1021/jo4011156
日期:2013.9.6
A general and high-yielding synthesis of nucleoside 5′-triphosphates (NTPs) and nucleoside 5′-diphosphates (NDPs) from protected nucleoside 5′-phosphoropiperidates promoted by 4,5-dicyanoimidazole (DCI) has been developed. 31P NMR tracing experiments showed that the sequential deprotection and coupling reactions were exceptionally clean. The phosphoropiperidate exhibited superior reactivity to the
已经开发了由4,5-二氰基咪唑(DCI)促进的受保护的核苷5'-磷酸哌啶酸酯合成核苷5'-三磷酸酯(NTPs)和核苷5'-二磷酸酯(NDP)的通用且高产率的方法。31 P NMR示踪实验表明,顺序的脱保护和偶联反应非常干净。磷酸哌啶酯对DCI促进的NTP / NDP合成显示出优于常规磷酸吗啉酸酯的反应性。实验结果表明,取决于焦磷酸盐和磷酸盐的不同亲核性,DCI激活的机制对于NTP和NDP合成可能是独特的。
Synthesis of anti-tumour phosphatidylinositol analogues from glucose by the use of ring-closing olefin metathesis
作者:Thomas L. Andresen、Dorthe M. Skytte、Robert Madsen
DOI:10.1039/b411021h
日期:——
A divergent strategy is described for synthesis of the novel phosphatidylinositols 1-3. The synthetic approach commences from benzyl-protected methyl 6-iodo-6-deoxy-alpha-D-glucopyranoside, which undergoes zinc-mediated reductive fragmentation followed by vinyl Grignard addition and ring-closingmetathesis to afford the key conduritol B intermediate 7. This can trifurcate to form three different benzyl-protected
counterparts, were applied to investigate their regulatory effect on insulin-degrading enzyme (IDE), using a range of biochemical, biophysical and computational methods. A unique interplay between IDE, its substrates and the PP-InsPs was uncovered, in which the PP-InsPs differentially modulated the activity of the enzyme towards short peptide substrates. Aided by molecular docking and molecular dynamics
Chemical Synthesis of α-<scp>d</scp>-Mannosylphosphate Serine Derivatives: A
New Class of Synthetic Glycopeptides
作者:Geert-Jan Boons、Galal Elsayed
DOI:10.1055/s-2003-40344
日期:——
α-d-Mannosylphosphate serine derivatives were conveniently synthesized by reaction of benzyl or cyanoethyl phosphochloroamidites with 2,3,4,6-tetra-O-acetyl-d-mannose to give intermediate α-mannosyl phosphoramidites, which were successfully reacted with properly protected serine derivatives in the presence of 1H-tetrazole to give phosphite triesters which could be oxidized to phosphotriesters using t-BuOOH.
An Improved Approach for Practical Synthesis of 5-Hydroxymethyl-2′-deoxycytidine (5hmdC) Phosphoramidite and Triphosphate
作者:Dong-Zhao Yang、Zhen-Zhen Chen、Mei Chi、Ying-Ying Dong、Shou-Zhi Pu、Qi Sun
DOI:10.3390/molecules27030749
日期:——
(5hmdC) phosphoramidite and triphosphate are important building blocks in 5hmdC-containing DNA synthesis for epigenetic studies. However, efficient and practical methods for the synthesis of these compounds are still limited. The current research provides an intensively improved synthetic method that enables the preparation of commercially available cyanoethyl-protected 5hmdC phosphoramidite with an
5-Hydroxymethyl-2'-deoxycytidine (5hmdC) 亚磷酰胺和三磷酸盐是用于表观遗传学研究的含 5hmdC 的 DNA 合成的重要组成部分。然而,合成这些化合物的有效和实用的方法仍然有限。目前的研究提供了一种经过深入改进的合成方法,能够以 5 g 的规模制备市售的氰乙基保护的 5hmdC 亚磷酰胺,总产率为 39%。在轻松高效获得氰乙基保护-5hmdU和5hmdC中间体的基础上,还开发了两条5hmdC三磷酸的高效合成路线。